Cat with bulb bow entry

[Therapy]

Anyone know of any trials using this idea?

Intriguing in my thoughts but I am no engineer or marine architect or calculus user or much of anything else either I guess.......

[cat man do]

Loch Crowther has used bulb bow's in his designs.

Dave

[Tropic Cat]

Some early Prouts had them. A guy I know circumnavigated with a Prout that had them. He tells the story of hitting a semi-submerged tree or board while crossing the Indian Ocean. This knocked one of the bow bulbs clean off the boat. I asked if he noticed any difference in sailing or motoring and the answer was....NO.

[Steve Rust]

This was a topic of an earlier thread. The bow bulbs are more effective on ships/boats that run at a constant speed and the bulbs are immersed to a certain and constant depth. Works grreat on commercial ships but not much use on a sailboat.

[Therapy]

Originally Posted by Steve Rust

This was a topic of an earlier thread. The bow bulbs are more effective on ships/boats that run at a constant speed and the bulbs are immersed to a certain and constant depth. Works grreat on commercial ships but not much use on a sailboat.

I guess I should have done a search.

[44'cruisingcat]

I'm surprised this has been tried so often on multihulls, but I've never seen it tried on a sailing monohull. I would have thought it would work much better on a mono - their potemtial speed range is much smaller given that they essentially can't exceed hull speed.

[cat man do]

Originally Posted by 44'cruisingcat

I'm surprised this has been tried so often on multihulls, but I've never seen it tried on a sailing monohull. I would have thought it would work much better on a mono - their potemtial speed range is much smaller given that they essentially can't exceed hull speed.

You've stuck it in, now who's going to twist

Dave

[gramos]

bow bulbs would also help resist pitching due to increased buoyancy forward, having a damping effect , but would they slow down the hulls because of increased drag ???

[cat man do]

Crowthers design notes have some info on bulb bows in the pic.

I have sailed on Crowther cat's with bulb's and they were great, but in all fairness, did not sail the same design without bulb's to get a fair comparison.

Dave

[Therapy]

Originally Posted by cat man do

Crowthers design notes have some info on bulb bows in the pic.

I have sailed on Crowther cat's with bulb's and they were great, but in all fairness, did not sail the same design without bulb's to get a fair comparison.

Dave

Thanks for that.
I wonder if it is just that the looks would be a turn-off, visually speaking.
The way people are it would not surprise me to find that bulbs would be better but not accepted because of the way they look.

The first paragraph is pretty cool too.

I tried to google to find it but could not.

Dang............

[cat man do]

Here is a link to the whole article if that's what you were after

http://www.cruisersforum.com/forums/...r+design+notes

Dave

[Therapy]

Originally Posted by cat man do

Here is a link to the whole article if that's what you were after

http://www.cruisersforum.com/forums/...r+design+notes

Dave

Yes thank you.

I can't copy them though.

[Steve Pope]

bulbs have been tried on monohulls there is one here in NZ that was built in Germany 30 + years ago, whether it made any difference??

[cat man do]

Originally Posted by Therapy

Yes thank you.

I can't copy them though.

Treat it like a picture.

Left click, save picture as.

Dave

[Therapy]

Originally Posted by cat man do

Treat it like a picture.

Left click, save picture as.

Dave

That I can do.
Just can't cut and paste part of it to a friend.

No biggie..........I will send him the link.

Thanks.